3-74 FUEL SYSTEM (DFI)
Subthrottle Sensor (Service Code 32)
Turn the ignition switch OFF.
If the reading of input voltage is less than the standard,
check the ECU for its ground, power supply and wiring
If the input voltage is within the standard range, remove
the fuel tank, and check wiring from ECU to the subthrottle
sensor for continuity.
If the wiring is good, check the output voltage of the sub-
Subthrottle Sensor Output Voltage Inspection
Measure the output voltage at the ECU in the same way
as input voltage inspection.
Special Tool - Needle Adapter Set: 57001-1457
Subthrottle Sensor Output Voltage
Connections to ECU
(Without Oxygen Sensor Equipped Models [A])
Meter (+) → BL/W lead (terminal 19)
Meter (–) → BR/BK lead (terminal 22)
(Oxygen Sensor Equipped Models [B])
Meter (+) → BL/W lead (terminal 24)
Meter (–) → BR/BK lead (terminal 28)
Turn the ignition switch ON.
Measure the output voltage when the subthrottle valve is
fully opened or completely closed by hand.
Output Voltage at ECU
DC 0.93 ∼ 4.59 V (at subthrottle valve full
opening to closing)
The subthrottle sensor is operating correctly if the fol-
lowing voltages are obtained.
• DC 0.93 V (or slightly higher) with the subthrottle valve
at the closed position.
• DC 4.59 V (or slightly lower) with the subthrottle valve
at the fully open position.
Do not remove or adjust the subthrottle sensor. It
has been adjusted and set with precision at the fac-
Never drop the throttle body assy, can especially
on a hard surface. Such a shock to the sensor can